South Korea and US express solidarity over ship sinking

South Korea and the US expressed solidarity Thursday over the sinking of a South Korean warship they blame on North Korea, with high-ranking diplomats calling it a "defining moment" for the US-South alliance.
Tension is high on the Korean peninsula with North Korea warning any moves to punish it at the United Nations would mean armed conflict, possibly nuclear war.
South Korea and the US have urged Pyongyang to avoid fresh provocations and vowed to hold the regime accountable for the March sinking that killed 46 South Korean sailors. North Korea denies any role in the incident.